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Published online 6 May 2005
Published in Soil Sci Soc Am J 69:883-892 (2005)
DOI: 10.2136/sssaj2004.0202
© 2005 Soil Science Society of America
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Relationship of Apparent Soil Electrical Conductivity to Claypan Soil Properties

W. K. Junga, N. R. Kitchenb,*, K. A. Sudduthb, R. J. Kremerb and P. P. Motavallia

a Dep. of Soil, Environmental and Atmospheric Sciences, 148 Agricultural Engineering Building, Univ. of Missouri-Columbia, Columbia, MO 65211
b USDA-ARS, Cropping Systems and Water Quality Research Unit, 269 Agricultural Engineering Building, Univ. of Missouri-Columbia, Columbia, MO 65211



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  		Fig. 1. Histogram of apparent soil electrical conductivity (ECa) for whole field and research site.

 


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  		Fig. 2. Research site and soil sampling design.

 


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  		Fig. 3. Relationship between crop yield variation and cumulative precipitation from July to August.

 


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  		Fig. 4. Comparison of linear regression model and quadratic regression model of apparent soil electrical conductivity (ECa) to soil quality indicators by soil sampling depths. A, saturated hydraulic conductivity; B, bulk density; C, clay; D, silt; E, fine silt; F, coarse silt; G, sand; H, cation exchange capacity; I, total organic carbon; J, total N; K, phosphorus; L, soil enzyme; M, microbial biomass (CO2).

 




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